432666561 has 4 divisors (see below), whose sum is σ = 576888752. Its totient is φ = 288444372.

The previous prime is 432666539. The next prime is 432666571. The reversal of 432666561 is 165666234.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 432666561 - 2⁶ = 432666497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (432666571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72111091 + ... + 72111096.

It is an arithmetic number, because the mean of its divisors is an integer number (144222188).

Almost surely, 2^432666561 is an apocalyptic number.

It is an amenable number.

432666561 is a deficient number, since it is larger than the sum of its proper divisors (144222191).

432666561 is a wasteful number, since it uses less digits than its factorization.

432666561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144222190.

The product of its digits is 155520, while the sum is 39.

The square root of 432666561 is about 20800.6384757776. The cubic root of 432666561 is about 756.3412330249.

The spelling of 432666561 in words is "four hundred thirty-two million, six hundred sixty-six thousand, five hundred sixty-one".